83 research outputs found
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DEVELOPMENT OF HYPERLINK-BASED LEARNING MEDIA TO IMPROVE STUDENT LEARNING OUTCOMES IN ATOM MATERIALS
Full text linkThe development of technology directly requires the world of education to adjust these developments in improving the quality of education to create quality human resources. So that the world of education must be able to utilize technology to create more interesting, comprehensive, and interactive multimedia-based learning media. The purpose of this research and development is to describe the preparation steps and feasibility (validity) of Hyperlink-based PowerPoint learning media to improve student learning outcomes through learning media using the Hyperlink-based PowerPoint learning model which was developed in chemistry learning the development of atomic theory. This research and development produced PowerPoint learning media based on Hyperlink on atomic theory development material which has been declared feasible with the aim of learning media that are interesting and concise but complete for use by students and teachers and improve student learning outcomes. Validity was fulfilled based on the assessment of the validator by material experts and media experts with a feasibility level for media eligibility of 91.3% and material eligibility of 89% so that it is in the very feasible category for media and material. The results of the questionnaire to obtain student responses to the developed Android-based learning media were 80.6%. The results of increasing the value in chemistry learning on the material for the development of atomic theory using PowerPoint learning media based on Hyperlink includes 92.12% of the average student score and is in the very good category which shows that PowerPoint learning media based on Hyperlink on atomic theory development material is suitable for use as a medium learning and to improve student learning outcomes
THE POTENTIAL OF MEDICINAL PLANTS CULTIVATED FROM SOUTH ACEH AS ANTHELMINTIC AGENTS
Full text linkStudies on potential of medicinal plants used by the South Acehnese as anthelmintics for Ascaris lumbricoides have been conducted. The aim of this study was to find out the type and content of secondary metabolites of medicinal plants used by Acehnese in the South Aceh district through phytochemical screening. Data were collected through semi-structured interviews with anthelmintic medicinal plant users, herbal practitioners, and the general public. The interviews revealed that the community used 15 plant species and 19 plant parts as anthelmintics for A. Lumbricoides. Plant extracts were obtained by maceration with 96% ethanol, and secondary metabolite content was identified using phytochemical screening. According to the phytochemical screening results of 19 plant extracts, 17 extracts contained alkaloids, 18 extracts contained flavonoids, 8 extracts contained saponins, 18 extracts contained phenols, 16 extracts contained tannins, 9 extracts contained steroids, and 2 extracts contained triterpenoids
THE EFFECT OF USING PhET SIMULATION VIRTUAL LAB ON THE UNDERSTANDING OF THE ACID-BASE CONCEPT (A Case Study at Chemistry Education Department, Syiah Kuala University)
Full text linkThe Covid-19 pandemic has introduced numerous limitations to face-to-face learning, prompting a transition to online platforms. Consequently, this study aims to investigate the impact of using the PhET virtual lab on chemistry education students' understanding of the acid-base concept. Employing a quasi-experimental approach with a one-shot case study design, the research selected two classes (an experimental class and a control class) from the 2021 chemistry education cohort using purposive sampling. Data collection involved the use of tests, as multiple-choice questions, and non-test instruments, including questionnaires. The results of the study indicate that the calculated t-value t count of 14.905 surpassed the critical t-value ttable of 2.262 at a significance level of 5 percent (0.05), leading to the rejection of the null hypothesis (Ho) and the acceptance of the alternative hypothesis (Ha). This finding signifies a significant effect of utilizing the PhET virtual lab on chemistry education students' understanding of the acid-base concept. Moreover, students responded positively to the use of the PhET virtual lab, with 41 percent rating it as good and 40 percent rating it as very good.Keywords: PhET Simulation; Virtual Lab; Distance Learning; e-learning; Acid and Bas
DEVELOPING EDUCATIONAL E-POSTER BASED ON INSTAGRAM FOR THE TOPIC OF CORROSION AFFECTING FACTORS
Full text linkThe development of more sophisticated technology has become a powerful tool for achieving more effective and efficient educational objectives. In this instance, learning media that employ social media has been extensively adopted, and one of the potential alternatives is to utilize social media as learning media. This study aims to develop an e-poster social media Instagram on the material factors that affect corrosion and see the response of Chemical Education students of FKIP USK to the developed media. Using the ADDIE approach, RD (Research and Development) is the sort of research used. Student requirements surveys, an evaluation of the viability of the e-poster medium, and student response questionnaires were used to gather data. This research was carried out on the campus of the Faculty of Teacher Training and Education, Syiah Kuala University, Department of Chemistry Education, with research subjects being students majoring in Chemistry Education Force 2020 FKIP Syiah Kuala University consists of 3 class units with a total of 61 students consisting of 57 female and four male. The results showed that With an average percentage of 89 percent, the generated e-poster learning material meets the requirements for "very viable." With an average score of 84 percent, student reactions to the generated medium met the criterion for "extremely feasible." Based on the study's findings, the e-poster is a viable alternative learning medium.Keywords: Development; Learning Media; Instagram; E-Poster; Corrosio
DEVELOPMENT OF E-MODULE INTEGRATED WITH VIRTUAL LABORATORY ON ACID-BASE TITRATION MATERIAL TO IMPROVE CRITICAL THINKING SKILLS
Full text linkAlong with the advancement of science and technology, educators also need to be more innovative in order to improve the learning process, one of which is inventing new learning materials. With the development of information and communication technology, the virtual laboratory as an alternative way to resolve the issue. The aim of this study is to develop an e-module integrated with virtual laboratory on acid base titration material to improve students critical thinking skills. The development model used is the ADDIE model which consists of Analysis, Design, Development, Implementation, and Evaluation. The feasibility of the material from the e-module obtained was 81.66% in the category of very valid, and the feasibility of the media was obtained at 87.03% with the very valid category. This states that the e-module integrated with virtual laboratory is feasible to be used as a learning material. There is an effect of using the e-module integrated with virtual laboratory based on the hypothesis test result. The result of critical thinking skills indicators is categorized as very good with the average score of 80.9. The result of the pre-test is categorized as less with the average score of 51 and the post-test is categorized as very good with the average score of 80.143. It can be concluded that the e-module integrated with virtual laboratory can improve students critical thinking skills
DEVELOPMENT OF HOTS LITERACY BASED COGNITIVE ASSESSMENT TOOLS ON ACID BASE MATERIAL
Full text linkThe aim of this research is to develop HOTS Literacy based cognitive assessment tools, determine the feasibility of HOTS Literacy based cognitive assessment tools based on the BSNP, material expert validators, learning experts, and to get students response to HOTS Literacy based cognitive assessment tools on acid base material. This RD uses the 4D model (Define, Design, Develop and Disseminate). Field trials were conducted on a small scale from a single class. The validators consist of four material expert and one chemistry teacher. Pretest and posttest results also students response were used to collect data. According to validation by the experts', the level of feasibility according to BSNP resulted in an average percentage of 83% with the acquisition of criteria, namely high and valid/feasible. And the responses given by students in trials, the criteria were very good or high with an average percentage of 97%. It shows that the instrument considered very good, so it can be used to improve students' higher-order thinking skills
THE DEVELOPMENT OF STEM-BASED E-STUDENT WORKSHEETS ON ELECTROLYTE AND NON-ELECTROLYTE SOLUTION MATERIAL TO IMPROVE STUDENTS LEARNING OUTCOMES
Full text linkThe aim of this research is to develop STEM-based E-Student Worksheets, determine the feasibility of STEM-based E-Student Worksheets as assessed by material expert validators, learning experts, and design experts, and describe the effectiveness of STEM-based E-Student Worksheets in improving student learning outcomes in material electrolyte and non-electrolyte solutions. This RD using the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). Product trials were conducted on a small group of 30 students from a single class. Material experts, three learning experts, three design experts, and pretest and posttest results were used to collect data, which was then analyzed and described. According to the experts' feasibility assessment, three validators material experts, three learning expert validators, and three design expert validators were declared very feasible to use in the learning process with successive average scores: 81.5%, 87.78%, and 85.97% with very feasible criteria and E-Student Worksheets based STEM which is designed to be effective for improving student learning outcomes and can be used in learning, With learning outcomes, an average pretest score of 51.67 and a posttest score of 86.33 were obtained, as well as an average N-Gain of 0.72 with high interpretation and a percentage of completeness of 90%
QUALITATIVE AND QUANTITATIVE ANALYSIS OF HYDROQUINONE CONTENT IN MARKETPLACE FACIAL WHITENING CREAMS
Full text linkHydroquinone is one of the dangerous ingredients in facial whitening cream cosmetics which can cause skin irritation, skin redness and a burning feeling. The purpose of this study was to determine the hydroquinone content in facial whitening cream cosmetics sold in the marketplace. The method used in this study was a qualitative test using a colour reagent test and the Thin Layer Chromatography (TLC) method with toluene:glacial acetic acid as the mobile phase (5:5) and Silica Gel254 Plate as the stationary phase. Quantitative analysis used the UV Vis spectrophotometry method at a wavelength of 541 nm. The results of the qualitative test in the TLC test showed that 4 samples tested positive for hydroquinone in samples A, B, D, and E, with a range of Rf values of 0.44, 0.5, 0.52, and 0.5, respectively. The results of the quantitative test showed that 9 samples contained hydroquinone with a sample content range of 0.22 to 3.62 ppmwith an LoD value of 0.637ppm and an LoQ of 2.124 ppm. The results of this study indicate that there are still cosmetics containing hydroquinone, these results are not following the Regulation of Badan Pengawas Obat dan Makanan (BPOM)No. KH. 00.01.43.2503 of 2009 where the use of this hydroquinone ingredient is prohibited for use in facial whitening creams because it can endanger health.Keywords: Analysis, Hydroquinone, TLC, Whitening Crea
EVALUATION OF CHEMISTRY LEARNING VIDEOS FROM ONLINE LEARNING APPLICATIONS IN INDONESIA
Full text linkE-learning is not distinct from the use of technology, which includes a variety of digital platforms. Zenius, Ruangguru, Pahamify, and other online learning systems are currently available in Indonesia. There are various learning films on the learning platform, such as on the applications B and C, which both give a variety of features and materials that complement the curriculum K-13, particularly in chemistry. The qualitative descriptive methodologies were used in this investigation. The purpose of this research is to compare the quality of chemistry learning resources available on online learning applications that correspond to the 2013 curriculum. Data is gathered through the downloading and video monitoring of chemical compounds. Two learning apps, B and C, were utilized as examples. According to the findings of this study, application B has a bigger number of videos in the material than application C. In addition, the average video time on the B app is less topical than on the C app. A good learning video has an appropriate length. When the video is too long, the spectator becomes bored. The video's attributes should be clear, and a pleasant appearance, such as animation, can encourage students to follow
The Effect of Using Desktop Prezi Learning Media towards Student Learning Outcomes on Intermolecular Forces
No full textAbstractThe research, entitled The Effect of Using Prezi Desktop Learning Media on Students Learning Outcomes on Intermolecular Force Material, was conducted in class X IPA MAS Ulumul Quran Banda Aceh City. The purpose of this study was to analyze the affect of using Prezi learning media on learning outcomes, describe student learning activities and analyze student responses to Prezi learning media applied to intermolecular forces material. This study used a quantitative approach with a quasi-experimental type of research. The research instrument used in the form of test questions, student activity observation sheets and student response questionnaire sheets. Data analysis using t-test obtained t-count results were greater than t-table using a significant level of 0,05, namely 2,692 1,671, which means accepting Ha. The results of student activity observations obtained from student activity sheets in the experimental class of yhe first meeting were 81,77% in the active category and 96,59 in the very active category at the second meeting. Students responses to the use of Prezi media on is said to very good, with a percentage of 89,9%. Based on the data obtained, it can be concluded that there is an effect of using Prezi learning media on student learning outcomes on intermolecular forces material and can increase student learning activities and obtain a very good response from students on the use of desktop Prezi as a learning mediumKeywords: Prezi Desktop, Intermolecular Forces, Learning Media, Learning Outcome